The menus for all buttons and cell entries are activated by right clicking on them. Cells Rows Columns Tableau Rows (left of tableau) Highlight Row - changes the background color of every cell in the row for emphasis (toggles on/off); useful for classroom discussions. Delete Row - deletes the row from the tableau; one can continue to pivot in the tableau without errors. Add Row Before - inserts an empty row into the tableau above the given row; this is usually done while constructing the original tableau or modifying a copied tableau (if done after several pivots then further pivots will most likely not be integral); also useful when adding cutting planes for integer optimization problems, but you can add a column simulaneously with the cell button Add Row and Column After instead. Add Row After - inserts an empty row into the tableau below the given row; this is usually done while constructing the original tableau or modifying a copied tableau (if done after several pivots then further pivots will most likely not be integral); also useful when adding cutting planes for integer optimization problems, but you can add a column simulaneously with the cell button Add Row and Column After instead. Fill Row with 0s - enters 0 in each cell of the row; useful for sparse matrix construction. Fill Row with 1s - enters 1 in each cell of the row; useful for problems involving convexity and games. Mark as Equality - marks the row as an equality by putting a red E on the row button (toggles on/off); the E will remain red until a pivot is performed in the row, at which point it will change to (and remain) a green E; useful for remembering to pivot in a basic variable for an equality constraint.